Green Silver Plated Ring

This stunning ring features a vibrant green gemstone set in a sleek band. Perfect for adding a touch of elegance to any outfit. stamped 925, and is silver plated. a lot of these silver has worn off and you can see the gold tone underneath. this is all along the band. please see photos for details. otherwise it is in great condition! I am unsure what stone this is, or of it is a stone !